I haven't had the chance to try the AC yet. I put it in later last year and just used the heat setting. And I'm actually in silverlake, wa. I moved here last year and changed my location on here and if you look at my profile it says silverlake, but the display says Vancouver. Not sure why that is.
Yeah those 25ft lines suck, but I was able to find a way to use the extra length up. I've seen online different ways of hiding the line. One person made a box and coiled the extra line up in that.
For line covers I didn't use the Mr cool ones. I bought them and took them back. I got mine off amazon. I needed two sets of them.
You will need help mounting the unit. Trying to hold it up and feed the lines through a hole in the wall isn't easy even with a second person helping. I made a small temporary shelf to take the weight of the unit and I held it there while my wife helped feed the lines through the wall. It was not an easy task at all.